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Table 1 Sociodemographic and clinical characteristics of participants by retention status

From: Chinese patients’ clinical and psychosocial outcomes in the 6 months following percutaneous coronary intervention

Characteristics Total (N = 610) Retained at 6 months (n = 491) Lost to follow-up (n = 119) p* p
Sociodemographic      
Age (years) 62.3 ± 11.1 62.4 ± 11.1 62.0 ± 10.8 0.729 0.047
Sex (% Male) 460 (75.4%) 365 (74.3%) 95 (79.7%) 0.212 0.332
Nationality (% Han) 605 (99.3%) 487 (99.2%) 118 (99.2%) 0.325 0.658
Insurance     0.006 0.137
Employee medical insurance 251 (41.2%) 215 (43.8%) 36 (30.5%)   
Urban residents’ medical insurance 296 (48.6%) 223 (45.4%) 73 (61.9%)   
Public or rural cooperative medical care 12 (1.9%) 8 (1.6%) 4 (3.4%)   
Self-pay 50 (8.2%) 45 (9.2%) 5 (4.2%)   
Clinical      
Cardiac history      
Previous MI 44 (7.2%) 28 (5.7%) 16 (13.4%) 0.001 0.708
Previous HF 6 (1.0%) 2 (0.4%) 4 (3.4%) 0.004 0.555
Previous valve procedure 3 (0.5%) 2 (0.4%) 1 (0.8%) 0.053 0.840
Previous PCI 82 (13.4%) 55 (11.2%) 27 (22.7%) < 0.001 0.602
Previous CABG 2 (0.3%) 2 (0.4%) 0 0.074 0.880
Comorbidities      
Cerebrovascular Disease 50 (8.6%) 40 (8.1%) 10 (8.4%) 0.126 0.199
Kidney disease requiring dialysis 1 (0.2%) 0 1 (0.8%) 0.038 0.846
Peripheral arterial disease 0 0 0 0.683
Lung disease 18 (3.0%) 11 (2.2%) 7 (5.9%) 0.013 0.196
PCI information      
Indication for PCI     < 0.001 < 0.001
Acute coronary syndrome 318 (52.1%) 287 (58.9%) 31 (26.5%)   
Atherosclerotic lesions in coronary arteries without ACS 284 (46.6%) 198 (40.7%) 86 (73.5%)   
Culprit vessel     < 0.001 0.001
Left main 5 (0.8%) 3 (0.6%) 2 (1.7%)   
Right coronary artery 105 (17.2%) 76 (15.5%) 29 (24.4%)   
Left circumflex 91 (14.9%) 63 (12.8%) 28 (23.5%)   
Left anterior descending 208 (34.1%) 163 (33.2%) 45 (37.8%)   
More than 2 vascular lesions 201 (33.0%) 186 (37.9%) 15 (12.6%)   
Other      
Degree of stenosis 91.6 ± 12.8 92.2 ± 12.6 89.5 ± 13.7 0.060 < 0.001
Troponin 2.0 ± 7.6 2.0 ± 8.2 1.7 ± 4.2 0.656 0.202
D-dimer 2.7 ± 4.3 4.5 ± 0.2 0.6 ± 0.1 < 0.001 0.001
Risk factors      
Hypertension 396 (64.9%) 315 (64.2%) 81 (68.1%) 0.655 0.915
Dyslipidemia 224 (36.7%) 172 (35.0%) 52 (43.7%) 0.078 0.146
Body mass index 24.8 ± 3.4 24.9 ± 3.4 24.8 ± 3.3 0.729 0.297
Smoking in past year 230 (37.7%) 185 (37.7%) 45 (37.8%) 0.978 0.445
Family history of premature onset CVD 174 (28.5%) 142 (28.9%) 32 (26.9%) 0.117 0.821
Diabetes 195 (32.0%) 156 (31.8%) 39 (32.8%) 0.834 0.344
Fasting blood glucose 7.1 ± 3.5 7.1 ± 3.7 6.7 ± 2.4 0.332 0.978
HbA1c 6.5 ± 3.1 6.4 ± 3.4 6.6 ± 1.5 0.626 0.166
C-reactive protein 10.7 ± 66.8 12.1 ± 74.6 5.5 ± 15.1 0.410 0.514
Disease severity indicators/other clinical factors      
Heart rate (bpm) 74.5 ± 11.2 74.5 ± 11.5 74.5 ± 10.2 0.969 0.090
Killip class     < 0.001 0.840
Class 1 368 (60.3%) 327 (90.3%) 41 (50.6%)   
Class II 61 (10.0%) 26 (7.2%) 35 (43.2%)   
Class III 2 (0.3%) 2 (0.5%) 0   
Barthel indexa 81.0 ± 23.7 78.1 ± 24.7 92.3 ± 13.6 0.007 < 0.001
Ejection fraction 31.4 ± 71.6 29.3 ± 74.2 55.8 ± 18.8 < 0.001 < 0.001
BNP 291.0 ± 906.7 220.8 ± 579.6 622.1 ± 1734.3 < 0.001 0.013
Length of stay (days) 6.6 ± 3.3 6.5 ± 3.1 6.9 ± 3.9 0.262 0.066
Medications      
Anti-platelets 605 (99.2%) 487 (99.2%) 118 (99.2%) 0.545 0.278
Lipid-lowering 580 (95.1%) 477 (97.2%) 103 (86.6%) < 0.001 0.295
Anti-hypertensives 505 (82.9%) 414 (84.3%) 91 (77.1%) < 0.001 0.002
ACE inhibitors 278 (45.6%) 226 (46.0%) 52 (43.7%) 0.214 < 0.001
Anti-arrhythmics 31 (5.1%) 23 (4.7%) 8 (6.7%) 0.251 0.154
Proton pump inhibitors 143 (23.4%) 107 (21.8%) 36 (30.3%) < 0.001 < 0.001
  1. n and % (based on available data; some was missing) or mean ± standard deviation shown
  2. BMI = body mass index, BP = blood pressure, HADS = Hospital Anxiety and Depression scale, TG = triglycerides, TC = total cholesterol, LDL = low-density lipoprotein, HDL = high-density lipoprotein, FBG = fasting blood glucose, CRP = C-reactive protein, A1c = glycated hemoglobin, EF = ejection fraction, PCI = percutaneous coronary intervention, CABG = coronary artery bypass graft, CAD = coronary artery disease, BNP = B-type natriuretic peptide, MI = myocardial Infarction, HF = heart failure, BPM = beats per minute, CKMB = creatine kinase-MB, CVD = cardiovascular disease, ACS = acute coronary syndrome
  3. *p for comparison of variable by 6-month follow-up retention (yes/no), using chi-square (fisher’s exact with small cell sizes) or t-test, as appropriate
  4. p for association with adverse cardiovascular events at 6 months (any; yes vs no), tested using independent samples t-test or chi-square analysis, as applicable
  5. aScores range from 0 to 100, with higher scores indicating better ability to engage in activities of daily living